feat(ccw): migrate backend to TypeScript

- Convert 40 JS files to TypeScript (CLI, tools, core, MCP server)
- Add Zod for runtime parameter validation
- Add type definitions in src/types/
- Keep src/templates/ as JavaScript (dashboard frontend)
- Update bin entries to use dist/
- Add tsconfig.json with strict mode
- Add backward-compatible exports for tests
- All 39 tests passing

Breaking changes: None (backward compatible)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

ccw/bin/ccw-mcp.js

@@ -4,4 +4,4 @@
  * Entry point for running CCW tools as an MCP server
  */
 
-import '../src/mcp-server/index.js';
+import '../dist/mcp-server/index.js';

ccw/bin/ccw.js

@@ -5,6 +5,6 @@
  * Entry point for global CLI installation
  */
 
-import { run } from '../src/cli.js';
+import { run } from '../dist/cli.js';
 
 run(process.argv);